Attachment for operating drills.



A. BELANGER.

ATTACHMENT FOR OPERATING DBILLS.

APPLICATION FILED MAY 27, 1908.

922,558. I Patented May 25, 1909.

, IHVHITOR .A BEE-ANGER.

W74 7 BY 5 I ATT Y'.

1m: 0PM: PETERS co. WASHINGTON, n. 'c.

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ATTAOHI/IENT FOR OPERATING 133111148.

Application filed May 27,

T 0 all whom "it may concern:

Be it known that I, ALFRED BELANGER, of the town of Larder City, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Attachments for Operating Drills, of which the following is a specification.

My invention relates to improvements in attachments for operating drills, and the objects of my invention are to provide a manually-operated device for use in hand drills by means of which the drill may be raised and turned by the operator striking the same, whereby the drilling operation may be carried out by one man in place of with two, as are at present used.

As well as securing greater efficiency, and accuracy in the turning and raising of the drill, the attachment will avoid all liabilitv of accidents due to the striker injuring the man holding the drill. The attachment is also arranged to hold the drill accurately at any desired inclination, permitting an inclined hole to be drilled as readily as a vertical one.

The various parts of the invention and the specific points of novelty therein are more fully set forth and described in the following specifications and drawings.

In the drawings, Figure 1 is a perspective view of the attachment. Fig. 2 is a transverse section through the same. Fig. 3 is a section along the line 2 2, Fig. Fig. 4 is a side elevation of the toothed plate for rotating and raising the drill and the supporting plate therefor. Fig. is a section on the line 33, Fig. 3. Fig. 6 is an elevation showing the adjustable means for connecting the supporting bracket of the drill to the main frame.

In the drawings, like characters of reference indicate corresponding parts in each figure.

Referring to the drawings, A represents the main frame, preferably of wood or other light construction. This is provided on one end with two upright standards 11 and 12, which ournal at the top a tubular sleeve 13, within which is supported the shaft 14, the said shaft being locked to the sleeve in any outwardly adjusted position, by means of a clamping set-screw 15. The sleeve is held in longitudinal position by means of suitable collars 16 and 17 connected thereto by suitable set-screws.

On the sleeve 13 and between the two Specification of Letters Patent.

1908. Serial No. 435,197.

Patented May 25, 1909.

standards, a ratchet wheel B is mounted, which is engaged by a plurality of gravityoperated, pivoted pawls 18 supported from a bracket C which has one end pivoted to the sleeve 13, and has the opposite end pivsite end of which is pivoted to a standard E, extending upwardly from the frame A. To compensate for the tilting movementof the lever D the pivoting connect-ion to the bracket E is made adjustable, as by forming an elongated slot 50 in the lever D through which the pivoting pin 51 extends. The lever D is normally maintained in its uppermost position by means of a strong compression spring F, which extends around a rod 19 extending from the frame A through an aperture 20 in the lever, the said spring abutting at the bottom a-crosspiece 21 on the frame, and at the tip, the underside of the lever D.

On the extremity of the shaft 14:, a beveled pinion G is provided, the teeth of which engage the teeth 22 in a toothed plate H, wh ch is gravity-held in contact with a supporting plate I, which latter is supported by a bracket J from the main frame. The toothed plate H has slidable connection with the drill K, this being accomplished, in the embodiment illustrated, by means of two sem1- cylindrical chuck-blocks 23 and 2 which fit in a cylindrical aperture 25 in the tubular plate H and have at their center, a hexagonal aperture within which the drill extends.

To provide for the raising of the drill, during turning, the plate H is prov ded on the underside, with a series of radlal COT? rugations 26, which engage like corrugations 27 formed in the supporting plate I.

In addition to the support derived from the bracket J, the plate I is further supported by means of a longitudinally adjustable leg L connected thereto, the adjustment, in the embodiment illustrated, being effected by forming the leg in two parts 30 and 31 slidable with respect to each other and having slots 32 and 33 in each, through which the clamping-bolt 34: extends.

In order to enable the drill to be adjusted outwardly from. the frame, the bracket J is made outwardly adjustable, this being accomplished by forming the horizontal portion of the bracket in two parts 35 and 36, having slots in each, which are connected by a clamping bolt 37.

In order to permit adjustment of the inoted to the extremity of a lever D, the oppoof being connected directly to the frame, is

connected thereto through the medium of a lever M, which is centrally pivoted to the sleeve 13 to the lower end of which the j 'tion of the drill, the bolts 41 and 42- are bracket is bolted: There is also preferably provided a second lever N adjacent to. the opposite standard 12, whereby the bracket supporting, theplate and the drill, itself, may be moved to either side of" the frame. The upper extremities of, these levers M and N are; connectedby a bar 38 which, supports on its top, a second bar 39, which supports at its extremity, asleeve 4:0 extending about the upper part of'the drill and serving to steady the same. The; two bars are connected together. by suitable clamping set-screws 40, which extend through a series of perforations provided in each. To clamp the levers M and N in any desired adjustment, bolts &1 and 42 are provided, extending through arouate slots 43 and 44 in the central part of the levers and secured to the sides of the stand ards l1 and 12.

T o operate the lever D, a long lever O is provided: connectedto the inside thereof by a suitable hook andeye 45 and d6, the'free ends of the said, lever. extending a distance to one side of the frame and resting on the ground. This long lever O will, in practice, he cut in the bush in whatever locality the drill is used, and it will be unnecessary to. carry the same around with the drill.. To enable either foot to be used, a second lever O may be connected at right. angles to this.

In operation, the drill isadjusted in position over the rock or other material to be drilled, and after each stroke of the hammer on the top of the drill, the striker will depress the lever O. with his foot. The clownward movement of thelever will produce no effect beyond that of depressing the lever D the said lever tilting about its pivoting point on the bracket E, and the bracket O also tilt- .ing downwardly and about its pivoting point and allowing the lever and bracket to bend at their pivoting point. On release of the lever D, the spring F will normally press the lever D upwardly and the pawl 18 engaging the ratchet wheel B will turn the samea partial revolution. This will turn the sleeve 13 and shaft 14L with the pinion G a. like amount, and this will turn the toothed plate H. In turning however, the plate H will be raised, as the corrugations 26 and 27,

' when the plate is at rest, normally fit into each other, the ribs on one extending into the depressions in the other, but duringrotation, the corrugations will be raised until the edges of, the opposite ribs. engage with each other. On completion of the movement, the plate H will again settle down to normal position with the corrugations thereon fitting into the corresponding corrugations on the plate I. The turning movement of the plate H will cause the chuck blocks 2-3v and 2d togrip-tightly against the side of the drill and this will cause the drill to move around and upwardly with the toothed plate H. When it is desired to adjust the inclinaloosened, and the levers M and N turned until the desired inclination is reached, the bracket J being carried up and turned with the lever M. On adjusted position being reached, the bolts 41 and 4L2 are again tightened. To adjust the lever outwardly, the clamping bolts 37 and 40 are loosened and the rod 39 and bracket J adjusted outwardly and then clamped in adjusted position.

As many changes could be made in the above construction, and many apparently widely different embodiments of my invention could be made without departing from the spirit or scope thereof, it is intended that all matter contained in these specifications and drawings shall be interpreted as illustrative and. not in a limiting sense.

What I claim as my invention is 1. The combination with the hand drill, of. a toothed plate having sliding engagement therewith, and having corrugations on the underside thereof, a supporting plate having corresponding corrugations, and manually operable means for turning the toothed plate.

2. The combination with a hand drill, of a toothed plate having a central aperture therein, through which the drill extends, and

also having corrugations on the underside thereof, chuck-blocks having frictional e11- gagement with the plate and slidable engagement with the drill, and being non-rotatable with respect to the drill, a supporting plate for the toothed plate having corresponding having sliding engagement therewith, means operated by the turning movement of the plate for raising the same, a shaft, driving means between the shaft and the plate, a ratchet wheel on the shaft, a depressible lever having pawls on the extremity thereof engaging the ratchet wheel, a spring for returning the depressible lever to its normal position and a foot lever connected to the depressible lever, by means of which the same may be depressed.

5. The combination with a drill, of a plate having sliding engagement therewith, means operated by the turning movement of the plate for raising the same, a'shaft, driving means between the shaft and the plate, a ratchet wheel on the shaft, a bracket pivoted to the shaft having pawls thereon gravity held in contact with the ratchet wheel, a depressible pivoted lever having the end pivotally connected to the bracket and a compression spring for maintaining the lever in raised. position.

(3. The combination with the frame, a shaft supported therefrom and a pivoted lever on the shaft, means for clamping the same in adjusted position and a bracket supported from the lever, a rotatable plate supported from the bracket, means connecting the same with the shaft whereby the turning of the shaft turns the plate, means operated by the turning of the plate for raising the same, a hand drill, and means connecting the plate with the drill.

7. The combination with the frame, a

shaft supported therefrom and a pivoted lever 011 the shaft, means for clamping the same in adjusted position and abracket sup-- ported from the lever, a rotatable plate supported from the bracket, means connecting the same with the shaft whereby the turning of the shaft turns the plate, means operated by the turning of the plate for raising the same, a hand drill, means connecting the plate with the drill, and steadying means for the upper part of the drill supported from the tiltable levers.

8. In an attachment for drills, the combination with the main frame, driving shaft thereon and means for intermittently turning the same, a partial. revolution, of a hand drill, a plate having slidable engagement therewith, means for rotating the plate from the shaft, means operated by the turning of the plate for raising the same, and outwardly adjustable means for supporting the plate.

9. In an attachment for drills, the combination with the main frame, driving shaft thereon and means for intermittently turning the same, a partial revolution, of a hand drill, a plate having slidable engagement therewith, means for rotatingthe plate from the shaft, means operated by the turning of the plate for raising the same, outwardly adjustable means for supporting the plate and outwardly adjustable means for steadying the upper part of the drill above the plate.

In witness whereof I have hereunto set my hand in the presence of two Witnesses.

ALFRED BELANGER.

lVitnesses:

RUSSEL S. SMART,

W, B. MAJOR. H 

